Few questions about ambientAnim

[wok 1]

I am working on a mission and the player will start sitting on a chair. I am using this to make him sit:

[player, "SIT_AT_TABLE", "ASIS", chair1] calls BIS_fnc_ambientAnim;

It works fine, but I have a few questions:

1) Is it possible to let the player still move his head (like while holding alt) when using the ambientAnim?

2) How do I give the player the control back? because ambientAnim kinda disableUserInput, (esc, map, compass etc still works).

3) Is there any built-in animation to stand up from the sit anim?